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g3topbm - convert a Group 3 fax file into a portable bitmap
g3topbm
[-kludge] [-reversebits] [-stretch] [g3file]
Reads a Group 3 fax
file as input. Produces a portable bitmap as output.
- -kludge
- Tells
g3topbm to ignore the first few lines of the file; sometimes fax files
have some junk at the beginning.
- -reversebits
- Tells g3topbm to interpret
bits least-significant first, instead of the default most-significant first.
Apparently some fax modems do it one way and others do it the other way.
If you get a whole bunch of "bad code word" messages, try using this flag.
- -stretch
- Tells g3topbm to stretch the image vertically by duplicating each
row. This is for the low-quality transmission mode.
All flags can be abbreviated
to their shortest unique prefix.
The standard for Group 3 fax
is defined in CCITT Recommendation T.4.
Probably.
pbmtog3(1)
,
pbm(5)
Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
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